Page breaking within a slide environment

A slide environment can contain more than one ``page'' of slides; TEX will break slides into pages automatically. If the mere idea disturbs you, put the command

  \extraslideheight{10in}

in your document. You can then divide slides into pages yourself by starting new slide environments or using the
$\begin{MD} \newslide \end{MD}$
command within a slide environment. And you need read this section no further. If instead you use the command

  \extraslideheight{0pt}

then TEX will break pages the way you would expect. This is a quick and dirty way to break a whole paper or a long proof into slides. However, dividing material into slides is usually too delicate a matter to be left up to TEX, and ultimately you will make all the page breaks yourself. On the other hand, automatic page breaking can still be helpful at the early stages, letting TEX find preliminary page breaks for you. Setting the "" to "0pt" doesn't give you much flexibility about where to put the page breaks. Of course, you can always put a page break earlier than the one found by TEX, but occasionally you will prefer to let a slide overflow by a small amount rather than rewrite the whole slide. Therefore, by default, "seminar.sty" uses

  \extraslideheight{10pt}

This adds on an extra "10pt" to the target slide height (as determined by "" for landscape slides and "" for portrait slides) for the purpose of page-breaking only. If the resulting slide exceeds the slide height, you will get a message like

  LaTeX Error: Slide 3 overfull by 9pt.

"seminar.sty" then tries to reduce the slide to its maximum height by squeezing out rubber vertical space (e.g., tightening up the interline spacing). If the slide is still too full, you will get another warning like:

  Overfull \vbox by 4.4pt while output was active.

You can go back and look for a way to make the slide shorter, or you can insert a "" command to change the page-break, or you can just ignore these warnings. The recommended value to give in the argument of "" is the largest length by which you might be willing to let a slide overflow. After you have decided on the page breaks, you can shut up the warnings about overfull slides and ""'s with

  \renewcommand{\slidefuzz}{1in}

The value of (which should be length, even though is an ordinary command sequence) is the threshold above which "seminar.sty" gives a warning about an overfull slide. The default definition is "2pt".